Anti friotional chock oe leader foe eigkjim of vessels



(N0 Modal.)

L. DYER. ANTI FRIGTIONAL GHOOK 0R LEADER FOR RIGGING 0P VESSELS. No. 341,838.

Patented May 11, 1886.

:2 7 flttorneys linen STATES Farsi Fries.

LUCIUS DYER, OF MILLBRIDGE, MAINE, ASSIGNOR OF'TVO-THIRDS TO CHARLES H. DYER- AND GEORGE E. SAXVYER, BOTH OF SAME PLACE.

ANT'-FR|CT|ONAL CHOCK OR LEADER FOR RIGGING 0F VESSELS.

SPECIFICATION forming part of Letters Patent No. 3%l,838, dated May 11, 18186.

(No model.)

To (tZZ whom it may concern.-

Be it known that I, LUoIUs DYER, a citizen of the United States, and a resident of Millbridge, in the county of \Vashington and State of Maine, have invented certain new and use ful Improvements in Anti-Frictional Chocks or Leaders for the Rigging of Vessels; and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification, and in which- Figure 1 is a perspective view of a portion of ayard-arm provided with my improvement. Fig. 2is a longitudinal sectional view of the same, and Fig. 3 is a perspective view, on an enlarged scale, of the bail and plate comprisa ing my improvement.

Similar letters of reference indicate corresponding parts in all the figures.

O jammed at the side of the sheave in the slot,

if the rope or sheet is drawn to one side or the other, thus insuring the free passage of the rope or sheet over the pulley, as hereinafter more fully described and claimed.

In the accompanying drawings, the letter A indicates the end of a yard-arm, and this yard-arni-is provided with the usual slot, B, having the pulley C, over which the sheet D passes, journaled within it. The upper end of the slot is provided with a plate, E, which surrounds the slot, and is formed with a downwardly-proj ecting flange, F, which fits against the sides of the slot, filling out or lining the upper end of the slot. The plate is provided near the outer end with two pairs of upwardly-projeeting perforated lips, G G, one pair at each side of the slot, and the bail H, hav- 7 ing its outer end bent at a right angle to its 'side pieces, has its ends pivoted upon boits I I, passing through the perforated lips and through the ends of the bail.

A rectangular frame, J, is pivoted with pins K K, projecting from the middles of its end pieces, between the sides of the outer portion of the bail, and this frame is provided with two rollers, L L, which upon the sheet will tilt the pivoted bail and 6o the rocking frame within the bail, so as to keep the sheet straight with relation to the sheave, so that the sheet may be hauled home, or may be slackencd without any danger of the sheet chafing or getting caught in the slot by being drawn toward the side of the slot away from thesheave, as will happen where no bail and guide-rollers are provided, the bail and rollers preventing any danger of the sheet breaking from being cut or ehafed, andhaving an undue strain exerted upon it. The plate surrounding the upper end of the slot will re-enforce this slot and prevent the strain of the sheet upon the sheave from splitting the yard-arm, the flange lining the entire top of the slot and bearing considerable of the strain upon the slot. It follows that this guide-bail and rollers may be used in spars, booms, or any place where a rope passes over asheave, and is liable to have a strain exerted upon it transverse to the plane of the sheave, the de" vice being applicable to any sheave which is journaled within a slot or recess in a rigid object, and not in a swiveled or freely-moving block.

It is obvious that the application of this improvement is not limited to the yard-arms of vessels, but that it may be employed with equal advantage as outhauls on booms of foreand-a'ft vessels.

Having thus described my invention, I claim and desire to secure by Letters Patent of the United States 1. In combination with a sheave journaled in a slot, a flanged plate lining the upper end of the slot, and a pivoted frame above the sheave, having guide-rollers for the passage of a sheet, as and for the purpose shown and set forth.

2. In combination with a sheave journaled in a slot, a pivoted frame above the sheave, having guide-rollers in its outer end, forming a passage for a sheet or rope, as and for the purpose shown and set forth.

3. In combination with a-sheave journaled in a slot, a bail having its outer end bent at a right angle to its arms and pivoted at the top of the slot with the ends of the arms, and guide-rollers journaled in the outer bent portion of the bail, as and for the purpose shown and set forth.

4. In combination with a sheave journaled in a slot, a bail having its outer end bent outward ata right angle to its arms, and having the ends of its arms pivoted near the outer end of the slot, a frame having its ends pivoted between the bent portion of.- the bail, and guide-rollers j ournaled in the pivoted frame,

'as and for the purpose shown and set forth.

5. In combination with a sheave journaled in a slot, a plate having a downwardly-projecting flange and lining the upper end and 20 the edges of the slot, and provided with two pairs of upwardly-projecting lips, a bail having its outer end bent at a right angle to its arms, and having the ends of the arms pivoted between the lips, a rectangular frame having 25 trunnions at its ends pivoted in the sides of the bent portion of the bail, and two guiderollers journaled in the sides of the pivoted frame, forming a passage for a sheet or rope, as and for the purpose shown and set forth.

In testimony that I claim the foregoing as my own I have hereunto affixed my signature in presence of two witnesses.

LUCIUS DYER.

Witnesses:

EZEKIEL DYER, I HANNIBAL HAYFORD. 

